Mask for exposing flexographic plates
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United States of America Patent
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Dec 7, 1999
Issued Date -
N/A
app pub date -
Jan 6, 1998
filing date -
Jun 5, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A mask for exposing flexographic plates contains, besides the standard binary image, areas shaded with a partially light absorbing layer. This partial light absorbance changes the exposure in certain areas and optimizes exposure separately for each different part of the image. The mask can be a separate film or integral to the plate. The required absorbance can be automatically computed when the mask is being generated. The invention is particularly useful with thermal films, as thermal films do not have to trade off edge sharpness and gray levels.
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